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Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Sales Associate	Antonio Moreno	USA	1 2 3 4 5
2	Sales Manager	Jaime Yorres	France	1 2 3 4 5
3	Accountant	Hanna Moos	USA	1 2 3 4 5
4	Owner	Jaime Yorres	France	1 2 3 4 5
5	Sales Associate	Pascale Cartrain	USA	1 2 3 4 5
6	Accountant	Patricio Simpson	USA	1 2 3 4 5
7	Sales Agent	Patricio Simpson	England	1 2 3 4 5
8	Sales Consultant	Antonio Moreno	USA	1 2 3 4 5
9	Sales Consultant	Jaime Yorres	Spain	1 2 3 4 5
10	Sales Representative	Howard Snyder	England	1 2 3 4 5
11	Sales Associate	Hanna Moos	England	1 2 3 4 5
12	Sales Consultant	Howard Snyder	Austria	1 2 3 4 5
13	Marketing Assistant	Georg Pipps	Argentina	1 2 3 4 5
14	Sales Representative	Paul Henriot	Germany	1 2 3 4 5
15	Sales Manager	Georg Pipps	Brazil	1 2 3 4 5
16	Accountant	Patricio Simpson	England	1 2 3 4 5
17	Marketing Assistant	Antonio Moreno	Brazil	1 2 3 4 5
18	Owner	Matti Karttunen	Brazil	1 2 3 4 5
19	Accounting Manager	Pascale Cartrain	France	1 2 3 4 5
20	Sales Agent	Hanna Moos	Argentina	1 2 3 4 5
21	Accounting Manager	Hanna Moos	Brazil	1 2 3 4 5
22	Accounting Manager	Patricio Simpson	Germany	1 2 3 4 5
23	Sales Consultant	Matti Karttunen	Austria	1 2 3 4 5
24	Marketing Manager	Matti Karttunen	Austria	1 2 3 4 5
25	Accountant	Hanna Moos	Italy	1 2 3 4 5
26	Sales Consultant	Matti Karttunen	England	1 2 3 4 5
27	Owner	Matti Karttunen	Spain	1 2 3 4 5
28	Marketing Manager	Pascale Cartrain	France	1 2 3 4 5
29	Sales Representative	Paul Henriot	Spain	1 2 3 4 5
30	Sales Consultant	Hanna Moos	USA	1 2 3 4 5
31	Accounting Manager	Patricio Simpson	Italy	1 2 3 4 5
32	Accounting Manager	Patricio Simpson	Spain	1 2 3 4 5
33	Accountant	Patricio Simpson	Argentina	1 2 3 4 5
34	Marketing Assistant	Elizabeth Lincoln	Austria	1 2 3 4 5
35	Accounting Manager	Antonio Moreno	Argentina	1 2 3 4 5
36	Sales Representative	Matti Karttunen	Argentina	1 2 3 4 5
37	Sales Consultant	Pascale Cartrain	Argentina	1 2 3 4 5
38	Accountant	Elizabeth Lincoln	Bulgaria	1 2 3 4 5
39	Accountant	Georg Pipps	Spain	1 2 3 4 5
40	Accountant	Jaime Yorres	Argentina	1 2 3 4 5
41	Marketing Manager	Elizabeth Lincoln	England	1 2 3 4 5
42	Sales Consultant	Patricio Simpson	USA	1 2 3 4 5
43	Sales Manager	Jaime Yorres	USA	1 2 3 4 5
44	Owner	Howard Snyder	Italy	1 2 3 4 5
45	Accounting Manager	Pascale Cartrain	Germany	1 2 3 4 5
46	Sales Representative	Pascale Cartrain	Italy	1 2 3 4 5
47	Sales Consultant	Pascale Cartrain	Spain	1 2 3 4 5
48	Sales Agent	Pascale Cartrain	England	1 2 3 4 5
49	Marketing Manager	Elizabeth Lincoln	Austria	1 2 3 4 5
50	Sales Consultant	Hanna Moos	England	1 2 3 4 5
51	Sales Representative	Paul Henriot	Bulgaria	1 2 3 4 5
52	Owner	Antonio Moreno	Austria	1 2 3 4 5
53	Marketing Manager	Georg Pipps	Bulgaria	1 2 3 4 5
54	Marketing Assistant	Matti Karttunen	Argentina	1 2 3 4 5
55	Marketing Assistant	Patricio Simpson	Italy	1 2 3 4 5
56	Marketing Assistant	Matti Karttunen	Austria	1 2 3 4 5
57	Accounting Manager	Patricio Simpson	France	1 2 3 4 5
58	Sales Manager	Antonio Moreno	Austria	1 2 3 4 5
59	Sales Associate	Patricio Simpson	France	1 2 3 4 5
60	Sales Representative	Pascale Cartrain	Austria	1 2 3 4 5
61	Sales Manager	Howard Snyder	England	1 2 3 4 5
62	Sales Manager	Matti Karttunen	Bulgaria	1 2 3 4 5
63	Sales Manager	Georg Pipps	Argentina	1 2 3 4 5
64	Sales Consultant	Elizabeth Lincoln	Austria	1 2 3 4 5
65	Sales Associate	Elizabeth Lincoln	Austria	1 2 3 4 5
66	Accountant	Howard Snyder	USA	1 2 3 4 5
67	Sales Consultant	Hanna Moos	Italy	1 2 3 4 5
68	Accounting Manager	Antonio Moreno	Germany	1 2 3 4 5
69	Marketing Assistant	Hanna Moos	Italy	1 2 3 4 5
70	Marketing Assistant	Paul Henriot	Bulgaria	1 2 3 4 5
71	Owner	Jaime Yorres	USA	1 2 3 4 5
72	Sales Manager	Patricio Simpson	Germany	1 2 3 4 5
73	Sales Consultant	Howard Snyder	Spain	1 2 3 4 5
74	Owner	Jaime Yorres	Bulgaria	1 2 3 4 5
75	Sales Consultant	Jaime Yorres	Austria	1 2 3 4 5
76	Sales Agent	Pascale Cartrain	Austria	1 2 3 4 5
77	Sales Manager	Paul Henriot	Italy	1 2 3 4 5
78	Sales Representative	Howard Snyder	Argentina	1 2 3 4 5
79	Marketing Manager	Matti Karttunen	Austria	1 2 3 4 5
80	Owner	Pascale Cartrain	Brazil	1 2 3 4 5
81	Sales Associate	Patricio Simpson	Austria	1 2 3 4 5
82	Sales Associate	Georg Pipps	Argentina	1 2 3 4 5
83	Marketing Assistant	Elizabeth Lincoln	France	1 2 3 4 5
84	Marketing Manager	Elizabeth Lincoln	Argentina	1 2 3 4 5
85	Accountant	Jaime Yorres	Bulgaria	1 2 3 4 5
86	Accounting Manager	Elizabeth Lincoln	England	1 2 3 4 5
87	Sales Manager	Elizabeth Lincoln	USA	1 2 3 4 5
88	Marketing Manager	Jaime Yorres	Germany	1 2 3 4 5
89	Sales Associate	Patricio Simpson	Germany	1 2 3 4 5
90	Accountant	Paul Henriot	England	1 2 3 4 5
91	Owner	Pascale Cartrain	France	1 2 3 4 5
92	Sales Associate	Paul Henriot	Argentina	1 2 3 4 5
93	Sales Manager	Antonio Moreno	USA	1 2 3 4 5
94	Sales Representative	Georg Pipps	USA	1 2 3 4 5
95	Owner	Patricio Simpson	England	1 2 3 4 5
96	Sales Manager	Hanna Moos	USA	1 2 3 4 5
97	Sales Manager	Matti Karttunen	USA	1 2 3 4 5
98	Accountant	Jaime Yorres	Brazil	1 2 3 4 5
99	Sales Agent	Jaime Yorres	France	1 2 3 4 5
100	Marketing Assistant	Patricio Simpson	Bulgaria	1 2 3 4 5


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page size:

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Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="vb" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.GridExamplesVBNET.Performance.Virtualization.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

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